| Hydrochemical characteristics and sources of sulfate in Xiji teritary confined groundwater |
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| DOI：10.7606/j.issn.1000-7601.2014.04.034 |
| Key Words: sulfate hydrochemical composition soluble salt component sulfur isotope |
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| Abstract: |
| The hydrochemical compositions of 36 groundwater samples, the soluble salt components of 21 rock samples and the sulfur isotope compositions of 10 groundwater samples were analyzed so as to identify the origin of SO42- in groundwater in Xiji County of Ningxia where the content of SO42- in groundwater was generally excessive. The results showed that SO
42- was the main component of anion in the study area, and the concentration of sulfate in groundwater increased gradually from north to south along with the flow path of groundwater. The soluble components in Teritary strata were dominated by sulfate in the forms of gypsum and mirabilite. There were two sources of sulfate in groundwater: about 83% was originated from gypsum and mirabilite in rocks, and the rest was from sulfide in aquifers. |
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